Security barrier

Abstract

A security barrier apparatus that includes a ground sleeve that is concreted into the ground at finish grade height and a uniquely configured jam member that is movable within the ground sleeve from a first free position to a second jammed position in engagement with the inner wall of the tubular sleeve. Connected to the jam member and extending upwardly therefrom is an elongated tension bar having an upper, internally threaded portion that is receivable within the hollow body portion of the apparatus. The jam member includes a tapered wall portion that is mateable with a tapered wall portion provided on the lower portion of the apparatus. A draw bolt extends through the cover of the ground sleeve and is adapted to threadably engage the upper threaded portion of the tension bar. Rotation of the draw bolt will cause the jam member to move upwardly within the ground sleeve in a manner to cause the tapered surface of the jam member to move into jamming engagement with the tapered surface of the ground sleeve securely locking the apparatus in place.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates generally to security barriers. More particularly, the invention concerns a barrier having a removable bollard body portion for selectively preventing ingress and egress to a controlled space.[0003]2. Discussion of the Prior Art[0004]A number of different types of devices for controlling parking space access have been suggested in the past. In its simplest form, a cement post is often used as a bollard to protect an exterior wall of a building or some other structure. Removal of this type of bollard is only achievable with great difficulty and typically such bollards are not removed until the entire unit is replaced. However, in many instances it is highly desirable that the bollard be temporarily removed to reconfigure the controlled space or to allow free access to the controlled space for selected periods of time.[0005]Accordingly, various types of removable barrier devices have been des...

AI Technical Summary

Benefits of technology

[0009]In one form of the invention, a draw bolt extends through the cover of the ground sleeve and is adapted to threadably engage the upper threaded portion of the tension bar. With this construction, with the jam member positioned within the ground sleeve, rotation of the draw bolt will cause the jam member to move upwardly within the ground sleeve in a manner to cause the tapered surface of the jam member to move into engagement with the tapered surface of the ground sleeve. Continued upward movement of the jam member through continued rotation of the draw bolt will cause the jam member to move into jamming engagement with the inner wall of the ground sleeve thereby securely locking the bollard in position.

[0010]With the forgoing in mind, it is an object of the present invention to provide a novel, bollard-type security barrier apparatus which is of a simple design, is easy to install and remove by unskilled workman and is relatively inexpensive to manufacture.

[0011]Another object of the invention is to provide an apparatus of the character described which can be securely locked in its erected configuration in a manner to prevent unauthorized removal of the device.

Problems solved by technology

Removal of this type of bollard is only achievable with great difficulty and typically such bollards are not removed until the entire unit is replaced.

As a general rule, the prior art removable type barriers are of a complex construction and in many instances include elaborate and expensive mechanisms for operating the bollard.

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